content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import io.reactivex.common.*;
  import io.reactivex.common.internal.disposables.DisposableHelper;
  import io.reactivex.observable.*;
  import io.reactivex.observable.internal.disposables.EmptyDisposable;
  
  public final class ObservableTake<T> extends AbstractObservableWithUpstream<T, T> {
      final long limit;
      public ObservableTake(ObservableSource<T> source, long limit) {
          super(source);
          this.limit = limit;
      }
  
      @Override
      protected void subscribeActual(Observer<? super T> observer) {
          source.subscribe(new TakeObserver<T>(observer, limit));
      }
  
      static final class TakeObserver<T> implements Observer<T>, Disposable {
          final Observer<? super T> actual;
  
          boolean done;
  
          Disposable subscription;
  
          long remaining;
          TakeObserver(Observer<? super T> actual, long limit) {
              this.actual = actual;
              this.remaining = limit;
          }
          @Override
          public void onSubscribe(Disposable s) {
              if (DisposableHelper.validate(this.subscription, s)) {
                  subscription = s;
                  if (remaining == 0) {
                      done = true;
                      s.dispose();
                      EmptyDisposable.complete(actual);
                  } else {
                      actual.onSubscribe(this);
                  }
              }
          }
          @Override
          public void onNext(T t) {
              if (!done && remaining-- > 0) {
                  boolean stop = remaining == 0;
                  actual.onNext(t);
                  if (stop) {
                      onComplete();
                  }
              }
          }
          @Override
          public void onError(Throwable t) {
              if (done) {
                  RxJavaCommonPlugins.onError(t);
                  return;
              }
  
              done = true;
              subscription.dispose();
              actual.onError(t);
          }
          @Override
          public void onComplete() {
              if (!done) {
                  done = true;
                  subscription.dispose();
                  actual.onComplete();
              }
          }
  
          @Override
          public void dispose() {
              subscription.dispose();
          }
  
          @Override
          public boolean isDisposed() {
              return subscription.isDisposed();
          }
      }
  }
  